What Value of Sodium Is Too Low? Understanding Hyponatremia
                                
                                
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                                    1 min read                                
                            
                                According to the Mayo Clinic, a normal blood sodium level typically falls between 135 and 145 milliequivalents per liter (mEq/L). A blood sodium level below 135 mEq/L is medically defined as hyponatremia, but understanding exactly what value of sodium is too low requires distinguishing between mild, moderate, and severe cases.